-- world.event = {
--     S_EVENT_INVALID = 0,
--     S_EVENT_SHOT = 1,
--     S_EVENT_HIT = 2,
--     S_EVENT_TAKEOFF = 3,
--     S_EVENT_LAND = 4,
--     S_EVENT_CRASH = 5,
--     S_EVENT_EJECTION = 6,
--     S_EVENT_REFUELING = 7,
--     S_EVENT_DEAD = 8,
--     S_EVENT_PILOT_DEAD = 9,
--     S_EVENT_BASE_CAPTURED = 10,
--     S_EVENT_MISSION_START = 11,
--     S_EVENT_MISSION_END = 12,
--     S_EVENT_TOOK_CONTROL = 13,
--     S_EVENT_REFUELING_STOP = 14,
--     S_EVENT_BIRTH = 15,
--     S_EVENT_HUMAN_FAILURE = 16,
--     S_EVENT_DETAILED_FAILURE = 17,
--     S_EVENT_ENGINE_STARTUP = 18,
--     S_EVENT_ENGINE_SHUTDOWN = 19,
--     S_EVENT_PLAYER_ENTER_UNIT = 20,
--     S_EVENT_PLAYER_LEAVE_UNIT = 21,
--     S_EVENT_PLAYER_COMMENT = 22,
--     S_EVENT_SHOOTING_START = 23,
--     S_EVENT_SHOOTING_END = 24,
--     S_EVENT_MARK_ADDED  = 25, 
--     S_EVENT_MARK_CHANGE = 26,
--     S_EVENT_MARK_REMOVED = 27,
--     S_EVENT_KILL = 28,
--     S_EVENT_SCORE = 29,
--     S_EVENT_UNIT_LOST = 30,
--     S_EVENT_LANDING_AFTER_EJECTION = 31,
--     S_EVENT_PARATROOPER_LENDING = 32,
--     S_EVENT_DISCARD_CHAIR_AFTER_EJECTION = 33, 
--     S_EVENT_WEAPON_ADD = 34,
--     S_EVENT_TRIGGER_ZONE = 35,
--     S_EVENT_LANDING_QUALITY_MARK = 36,
--     S_EVENT_BDA = 37, 
--     S_EVENT_AI_ABORT_MISSION = 38, 
--     S_EVENT_DAYNIGHT = 39, 
--     S_EVENT_FLIGHT_TIME = 40, 
--     S_EVENT_PLAYER_SELF_KILL_PILOT = 41, 
--     S_EVENT_PLAYER_CAPTURE_AIRFIELD = 42, 
--     S_EVENT_EMERGENCY_LANDING = 43,
--     S_EVENT_UNIT_CREATE_TASK = 44,
--     S_EVENT_UNIT_DELETE_TASK = 45,
--     S_EVENT_SIMULATION_START = 46,
--     S_EVENT_WEAPON_REARM = 47,
--     S_EVENT_WEAPON_DROP = 48,
--     S_EVENT_UNIT_TASK_TIMEOUT = 49,
--     S_EVENT_UNIT_TASK_STAGE = 50,
--     S_EVENT_MAX = 51,
--   }

local e = {}
env.setErrorMessageBoxEnabled(true)

function e:onEvent(event)
    
    local eventId = event.id

    -- check initiator exist
    if event.initiator then
        local eventIni  = event.initiator

        -- takeoff
        if eventId == 3 then
            if eventIni:getName() == "Airbus" then -- when airbus take off
                trigger.action.setUserFlag("airbustf", 1) -- set trigger flag. 1 for takeoff and mission start
            end
        end

    end
end